Answer:Robert operates a virtual organization.
Explanation:
What is a virtual organization?
A virtual organization refers to organizations that work independently but usually come together on a non permanent contracts to offer their services to those who need it. Roberts has only three engineers however it is mentioned that any time he can have way more than that because virtual organizations work together as one network when a need arises on temporal basis. This means if he has more work that needs to be done he is able to temporarily work with other engineers to complete the job.
